My friend Deb Ray (Grace Maltese) is a professional groomer. She has told me that the true Korean cut requires a rounding of the trim which is very hard to do even for one as experienced as her 13+ years (I think).
I think Ein looks very cute. Faces are my big trouble, too. I can get the kind of look I want on the body with my girls especially when I do their haircuts, but I have so much trouble getting the face the way I want it and frankly so do most groomers. Deb Ray lives about 13 hours from me, but every chance I get to use her talent I do.